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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* This file define the irq handler for MSP SLM subsystem interrupts.
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*
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* Copyright 2005-2006 PMC-Sierra, Inc, derived from irq_cpu.c
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* Author: Andrew Hughes, Andrew_Hughes@pmc-sierra.com
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include <asm/mipsregs.h>
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#include <msp_slp_int.h>
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#include <msp_regs.h>
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static inline void unmask_msp_slp_irq(struct irq_data *d)
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{
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unsigned int irq = d->irq;
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/* check for PER interrupt range */
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if (irq < MSP_PER_INTBASE)
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*SLP_INT_MSK_REG |= (1 << (irq - MSP_SLP_INTBASE));
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else
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*PER_INT_MSK_REG |= (1 << (irq - MSP_PER_INTBASE));
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}
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static inline void mask_msp_slp_irq(struct irq_data *d)
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{
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unsigned int irq = d->irq;
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/* check for PER interrupt range */
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if (irq < MSP_PER_INTBASE)
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*SLP_INT_MSK_REG &= ~(1 << (irq - MSP_SLP_INTBASE));
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else
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*PER_INT_MSK_REG &= ~(1 << (irq - MSP_PER_INTBASE));
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}
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/*
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* While we ack the interrupt interrupts are disabled and thus we don't need
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* to deal with concurrency issues. Same for msp_slp_irq_end.
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*/
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static inline void ack_msp_slp_irq(struct irq_data *d)
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{
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unsigned int irq = d->irq;
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/* check for PER interrupt range */
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if (irq < MSP_PER_INTBASE)
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*SLP_INT_STS_REG = (1 << (irq - MSP_SLP_INTBASE));
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else
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*PER_INT_STS_REG = (1 << (irq - MSP_PER_INTBASE));
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}
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static struct irq_chip msp_slp_irq_controller = {
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.name = "MSP_SLP",
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.irq_ack = ack_msp_slp_irq,
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.irq_mask = mask_msp_slp_irq,
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.irq_unmask = unmask_msp_slp_irq,
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};
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void __init msp_slp_irq_init(void)
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{
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int i;
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/* Mask/clear interrupts. */
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*SLP_INT_MSK_REG = 0x00000000;
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*PER_INT_MSK_REG = 0x00000000;
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*SLP_INT_STS_REG = 0xFFFFFFFF;
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*PER_INT_STS_REG = 0xFFFFFFFF;
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/* initialize all the IRQ descriptors */
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for (i = MSP_SLP_INTBASE; i < MSP_PER_INTBASE + 32; i++)
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irq_set_chip_and_handler(i, &msp_slp_irq_controller,
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handle_level_irq);
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}
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void msp_slp_irq_dispatch(void)
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{
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u32 pending;
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int intbase;
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intbase = MSP_SLP_INTBASE;
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pending = *SLP_INT_STS_REG & *SLP_INT_MSK_REG;
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/* check for PER interrupt */
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if (pending == (1 << (MSP_INT_PER - MSP_SLP_INTBASE))) {
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intbase = MSP_PER_INTBASE;
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pending = *PER_INT_STS_REG & *PER_INT_MSK_REG;
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}
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/* check for spurious interrupt */
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if (pending == 0x00000000) {
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printk(KERN_ERR "Spurious %s interrupt?\n",
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(intbase == MSP_SLP_INTBASE) ? "SLP" : "PER");
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return;
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}
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/* dispatch the irq */
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do_IRQ(ffs(pending) + intbase - 1);
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}
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